稻壳灰无溶剂法制备钙霞石及其脱汞性能研究  

Preparation of Cancrinite from Rice Husk Ash by Solvent-Free Method for Mercury Removal

作　　者：郝志刚 时培祥 吕永康[2] Hao Zhigang;Shi Peixiang;LüYongkang(Coal Chemical Engineering Department,Shanxi Enginerring Vocational College,Taiyuan,Shanxi 330009;State Key Laboratory of Clean and Efficient Coal Utilization,Taiyuan University of Technology,Taiyuan,Shanxi 030024)

机构地区：[1]山西工程职业学院煤炭化工系,山西太原030009 [2]太原理工大学煤基能源清洁高效利用国家重点实验室,山西太原030024

出　　处：《非金属矿》2022年第5期39-42,47,共5页Non-Metallic Mines

基　　金：国家自然科学基金面上项目(51778397)。

摘　　要：基于无溶剂法合成沸石材料的绿色环保优势,以稻壳灰(RHA)为原料,替代化学试剂,采用无溶剂法合成钙霞石材料。稻壳灰经550℃焙烧除炭后,在晶化温度为100℃,Na_(2)CO_(3)·10H_(2)O与SiO_(2)摩尔比为0.4,晶化48 h条件下,合成了高结晶度的钙霞石吸附材料。采用X射线衍射(XRD)仪、傅里叶变换红外光谱(FTIR)仪、扫描电子显微镜(SEM)与材料孔性质检测分析(BET)仪等对产物的形态和结构进行测试。通过废水Hg^(2+)吸附分离试验研究合成的钙霞石的吸附性能。结果表明,当吸附剂用量为300 mg时,钙霞石对50 mL 10 mg/L汞废水中汞的去除率达到61.98%,较原料稻壳灰增加2.43倍。Based on the environmental advantages of the solvent-free method synthesizing zeolite materials,using rice husk ash(RHA)instead of chemically pure reagents as raw materials to synthesize cancrinite by a solvent-free method.Cancrinite with high crystallinity was prepared by roasting RHA at 550℃to remove carbon,when the crystallizing temperature was 100℃,the mole ratio of Na_(2)CO_(3)·10H_(2)O and SiO_(2) was 0.4,and the synthesis time was 48 h,the morphology and structure of the products were tested by characterization means such as X-ray diffraction(XRD),Fourier transforms infrared spectrometer(FTIR),scanning electron microscopy(SEM)and Brunner-Emmet-Teller measurements(BET).The adsorption properties of the as-prepared cancrinite are investigated by removing Hg^(2+) from wastewater.The experimental results show that when the amount of adsorbent is 300 mg,the removal rate of Hg^(2+) from 50 mL 10 mg/L wastewater by cancrinite reaches 61.98%,which is 2.43 times higher compared with the raw RHA.

关 键 词：稻壳灰 无溶剂法 钙霞石 脱汞 废水 晶化 

分 类 号：X71[环境科学与工程—环境工程] TQ424.25[化学工程]